Early A exhaust manifold questions

cosgig said

Pistons that bump the compression ratio to 10.5:1, and a slightly hotter cam. 4 bbl carb, and that’s about it, all other internals are the same!

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Dual point, finned valve covers with chrome oil fill and pcv caps (from the Hemi), Chrome un-silenced air cleaner. Larger diameter single exhaust. You either got a 273 2 barrel V8 or you got the Commando 4 barrel with all the above mentioned goodies.